3 axial accelerating output data which changes

摘要

As for this invention, at the place where determination precision such as around the interior and the high building which cannot utilize GPS is difficult to appear it regards the traveling direction measuring device which can use as the navigation device for the pedestrian. With the accelerating sensing station (1), 3 axial acceleration of the traveling direction measuring device which changes attendant upon walking of that pedestrian is detected, with the accelerating output data acquisition section (2), 3 axial accelerating output data which changes is detected attendant upon walking of the pedestrian who by the accelerating sensing station (1) is acquired above specified frequency over again. With the 1st acceleration of free fall calculation section (3), keeping in the attitude where the pedestrian locks the traveling direction measuring device in general, when it is walking, it calculates acceleration of free fall are acquired by averaging the accelerating data constellation of period of several step amounts which by the accelerating output data acquisition section (2), with the 1st portable direction presumption section (4), it presumes the portable direction of the pedestrian on the basis of the frequency component which is suitable to the period of the one step of the accelerating data constellation which is projected with respect to the plane surface which crosses in the acceleration of free fall which was calculated by the 1st acceleration of free fall calculation section (3).